SSA + autoinc segfaults

[Michael Hayes]

I'm getting a segfault when using -fssa.  NULL is being passed as the
regset for a register autoincremented.  The following patch treats the
symptoms but I do not know if it is the proper cure.

Michael.

Index: conflict.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/conflict.c,v
retrieving revision 1.2
diff -c -3 -p -r1.2 conflict.c
*** conflict.c	2000/04/07 08:16:31	1.2
--- conflict.c	2000/04/18 04:42:56
*************** conflict_graph_compute (regs, p)
*** 488,494 ****
  #ifdef AUTO_INC_DEC
  	      for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
  		if (REG_NOTE_KIND (link) == REG_INC)
! 		  mark_reg (XEXP (link, 0), NULL_RTX, NULL);
  #endif
  	      AND_REG_SET (born, regs);
  	  
--- 488,494 ----
  #ifdef AUTO_INC_DEC
  	      for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
  		if (REG_NOTE_KIND (link) == REG_INC)
! 		  mark_reg (XEXP (link, 0), NULL_RTX, (void *) born);
  #endif
  	      AND_REG_SET (born, regs);